A New Magnetic Material of High Permeability
- 1 February 1947
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 18 (2) , 173-176
- https://doi.org/10.1063/1.1697599
Abstract
This paper describes the preparation, heat treatment, and properties of supermalloy, a magnetic alloy of iron, nickel, and molybdenum. In the form of 0.014 in. sheet it has an initial permeability of 50,000 to 150,000, a maximum permeability of 600,000 to 1,200,000, coercive force of 0.002 to 0.005 oersted, and a hysteresis loss of less than 5 ergs/cm3/cycle at B=5000. Transformer cores made of insulated 0.001 in. tape, spirally wound, have about the same initial permeability and a maximum permeability of 200,000 to 400,000. The alloy has a Curie point of 400°C and appears to have an order‐disorder transformation temperature somewhat above 500°C.This publication has 5 references indexed in Scilit:
- Improvements in communication transformersElectrical Engineering, 1935
- Magnetic alloys of iron, nickel, and cobaltElectrical Engineering, 1935
- A Contribution to the Theory of FerromagnetismPhysical Review B, 1925
- Permalloy, an alloy of remarkable magnetic propertiesJournal of the Franklin Institute, 1923
- Magnetic and Other Properties of Electrolytic Iron Melted in VacuoTransactions of the American Institute of Electrical Engineers, 1914